Pulley



H. DENNIS.

PULLEY.

APPHCATION FILED JULY 20.1918. M

1,305,526 Patented June 3, 1919.

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HUNTER DENNIS, OF WOODLAKE, CALIFORNIA.

PULLEY.

i,3tl5,526.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed July 20, 1918. Serial No. 245,879.

To all whom 2'23 may concern:

Be it known that I, HUNTER DENNIS, a citizen of the United States, residing at VVoodlake, in the county of Tulare and State of California, have invented certain new and useful Improvements in Pulleys, of which the following. is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in pulleys, and has relation more particularly to a device of this general character of an expansible type, and it is an object of the invention to provide a novel and improved pulley comprising a sectional rim, and wherein means are provided for effectively connecting adjacent end portions of the rim.

Another object of the invention is to provide a novel and improved pulley of this character including a sectional rim together with fillers insertible between the ends of adjacent sections when said sections are adjusted outwardly relative to the hub of the pulley.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved pulley whereby certain important advantages are attained and the device is rendered simpler, less expensive and otherwise more convenient and advantageous for use, all as will be hereinafter more fully set forth.

The novel features of the invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure 1 is a fragmentary .view in side elevation with parts in section of a pulley constructed in accordance with an embodiment of my invention and with the segments at the limit of their expansion;

Fig. 2 is a fragmentary view in elevation of the inner faces of the end portions of ad j acent segments as herein set forth;

Fig. 3 is a fragmentary view in side elevation illustrating a modified form of invention;

Fig. a is a view in elemtion of the inner face portion of the structure as shown in Fig. 3, with certain of the parts in section; and

Fig. 5 is a transverse sectional view taken through a filler, as disclosed in Figs. 3 and l.

As herein disclosed 1 denotes a hub from which radiates the tubular or hollow spokes 2. Telescopically engaged with each of the spokes 2 is an inwardly directed arm 3 carried at substantially a longitudinal center of a section 4 of the rim R. ()verlying the adjacent end portions of each set of spokes 2 and arms is an elongated rigid strip of metal 5 having in its opposite end portions longitudinally disposed slots 6. Directed through the slots 6 are the clamping screws 7 in threaded engagement with the spoke 2 and the arm 3. and whereby the arm 3 and the spoke 2 are effectively held in their various relative adjustments and which adj ust ments are effected when it is desired to expand or contract the rim R.

Vhen the rim R is at the limit of its contraction, the ends of adjacent sections 4: are substantially in contact. One end of each of the sections 4 is provided with an inwardly directed perforated ear 8 and the opposite end portion is provided with a pair of inwardly directed and transversely spaced ears 9. l0 denotes a tie member disposed longitudinally on the requisite curvature and which has one end provided with the forks 11 which are adapted to straddle the ear 8 at one end of a section l while the opposite end portion of the member 10 is adapted to snugly fit between the perforate ears 9 at the adjacent end portion of the next succeeding section. The fork 11 is coupled to the ear 8 through the medium of the removable pin 12 and the opposite end portion of the member 10 is coupled to the ears 9 by the removable pin 141 inserti'ble through said ears and the opening 15 in the member 10.

When it is desired to expand the pulley, each of the members 10 is disconnected at one end from one of the sections t with which it coacts and the sections 4: are outwardly adjusted by the requisite relative movement of the spokes 2 and arms 3. In the embodiment of my invention as particu larly illustrated in Figs. 3, 4, and 5, when the sections 4 are properly positioned, a filler 16 is fitted between the opposed ends of adjacent sections at. The filler 16 is provided with an inwardly directed arm 17 terminating in a substantially perpendicularly related extension 18 and which extension 18 is directed substantially circumferentially of the rim B when the filler is in applied position.

The heel portion of the arm 17 is provided with a pair of transversely spaced ears 19 between which an end portion of the member 10 extends and is coupled thereto by a removable pin in the same manner as has hereinbefore been set forth relative to the coaetion of the member 10 directly with tWo adjacent sections 4. The outer or free end portion of the extension 18 is adapted to fit between a pair of transversely spaced ears 9 carried by one of the sections 4 and said free end portion is provided with an opening 20, through which a. coupling pin or bolt is disclosed.

It is to be understood that the fillers 16 are to be of a length in accordance with the extent of outward adjustments of the sections 4 and that when in applied position, the outer surface or periphery of the fillers will be in continuity with the outer surface or periphery of the sections 4.

In the form of my invention particularly illustrated in Fig. 1 the pulley is expanded, the members or plates 21 are interposed between adjacent sections 4:. As particularly illustrated in Fig. 1, the hinged connection between adjacent sections a and members or plates 21 is afforded by the rigid straps 22 connected at one end to the ears 8 or 9 of the sections 4, and at their opposite ends with the cars 23 carried by the members or plates 21.

From the foregoing description, it is thought to be obvious that a pulley constructed in accordance with my invention is of an extremely simple and comparatively inexpensive nature and is particularly well adapted for use by reason of the convenience and facility with which it may be assembled, and it will also be obvious that my invention is susceptible of some change and modification without material departure from the principles and spirit thereof, and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice, except as hereinafter claimed.

I claim 1. An expansible pulley comprising a sectional rim, 'mea'ns'for holding sa1d sections in various radial adjustments, fillers insertible between the ends of adjacent sections of the rim when said sections are radially adjusted outwardly, each of said fillers being provided with an inwardly directed arm terminating in an extension disposed in a direction circumferentially of the rim, means for connecting the'free end portion of the extension to the end portion of one of the sections adjacent the filler, and a member connecting the end portion of the second adj acent section and the heel portion of the extension.

2. An expansible pulley comprisinga sectional rim, means for holding said sections in various radial adjustments, fillers insertible between the ends of adjacent sections of the rim when said'sections are radially adjusted outwardly, each of said fillers being provided with aninwa rdly directed arm terminating in an extension disposed in a direction circum-ferentially of the rim, means for connecting the free end portion of the extension tothe end port-ion of one of the sections adjacent the filler, and a member connecting the end'portion of the second adjacent section and the heel portion of the extension, said member serving to connect the ends of adjacent sections when the filler is removed and the sections are at their limit of contraction.

3. A pulley oft-he class described comprising a sectioliali'im, means for holding said sections in various radial adjustments, inwardly directed ears carried by the end portions of the sections, and a tie member deta'ch'ably engageable with theea'rs of adjacent rim sections.

In testimony whereof I hereunto afiix my signature in the presenceof two witnesses.

HUNTER DENNIS. lVitness'es:

K. VAN ZANTE, GEO. E. HARP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

